This past summer I purchased a mat at Joanns with a 50% coupon. Score right??? Well, I stopped in to visit with Mom and didn't think about the mat in the car...Well, it was all curvy and wavy...Sooooo I laid it out on my deck and placed a large sheet of plywood on top along with a few other pieces and some bricks....Voila..a flat Mat!!!
I will NEVER make that mistake again LOL